- What's New
- Function Overview
- Service Overview
- Getting Started
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User Guide
- Elastic IP
- EIP Billing
- Shared Bandwidth
- Monitoring
- Permissions Management
- Change History
- Best Practices
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API Reference
- Before You Start
- API Overview
- Calling APIs
- APIs
- API V3
- Native OpenStack Neutron APIs V2.0
- Application Examples
- Permissions Policies and Supported Actions
- Appendix
- Change History
- SDK Reference
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FAQs
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Product Consultation
- What Is a Quota?
- How Do I Assign or Retrieve a Specific EIP?
- Why Is an EIP Newly Assigned the Same as the One I Released?
- What Are the Differences Between EIP, Private IP Address, and Virtual IP Address?
- Can an EIP That Uses Dedicated Bandwidth Be Changed to Use Shared Bandwidth?
- Can I Bind an EIP to Multiple ECSs?
- What Are the Differences Between the Primary and Extension NICs of ECSs?
- What Is the EIP Assignment Policy?
- Can I Buy a Specific EIP?
- Does an EIP Change Over Time?
- How Do I Query the Region of My EIPs?
- Can a Bandwidth Be Used by Multiple Accounts?
- How Do I Unbind an EIP from an Instance and Bind a New EIP to the Instance?
- Why Can't I Find My Purchased EIP on the Management Console?
- Why My EIPs Are Frozen? How Do I Unfreeze My EIPs?
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Billing and Payments
- How Is an EIP Billed?
- How Do I Change My EIP Billing Mode Between Pay-per-Use and Yearly/Monthly?
- How Do I Change the Billing Option of a Pay-per-Use EIP Between By Bandwidth and By Traffic?
- What Is Enhanced 95th Percentile Bandwidth Billing?
- Why Am I Still Being Billed After My EIP Has Been Unbound or Released?
- When Will I Be Billed for Reservation Price?
- EIP Binding and Unbinding
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Bandwidth
- What Bandwidth Types Are Available?
- Is There a Limit to the Number of EIPs That Can Be Added to Each Shared Bandwidth?
- What Are the Differences Between a Dedicated Bandwidth and a Shared Bandwidth?
- What Are Inbound Bandwidth and Outbound Bandwidth?
- How Do I Know If My EIP Bandwidth Limit Has Been Exceeded?
- What Is the Relationship Between Bandwidth and Upload/Download Rate?
- What Are the Differences Between Static BGP and Dynamic BGP?
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Connectivity
- What Are the Priorities of the Custom Route and EIP If Both Are Configured for an ECS to Enable the ECS to Access the Internet?
- Why Can't My ECS Access the Internet Even After an EIP Is Bound?
- Why Can't an EIP Be Pinged?
- How Do I Unblock an EIP?
- Why Is There Network Jitter or Packet Loss During Cross-Border Communications?
- Why Does the Download Speed of My ECS Is Slow?
- Change History
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Product Consultation
Public Network Access
Products
Cloud services, such as EIP, NAT Gateway, and ELB can be used to connect to the Internet.
- EIP
The EIP service provides independent public IP addresses and bandwidth for Internet access. EIPs can be bound to or unbound from ECSs, BMSs, virtual IP addresses, NAT gateways, or load balancers. Various billing modes are provided to meet diverse service requirements.
- ELB
ELB distributes access traffic among multiple ECSs to balance the application load, improving fault tolerance and expanding service capabilities of applications. You can create a load balancer, configure a listening protocol and port, and add backend servers to a load balancer. You can also check the running state of backend servers to ensure that requests are sent only to healthy servers.
- NAT Gateway
NAT Gateway provides both SNAT and DNAT for your servers in a VPC and allows servers in your VPC to access or provide services accessible from the Internet.
Providing Services Accessible from the Internet
- Multiple ECSs balance workloads.
In high-concurrency scenarios, such as e-commerce, you can use load balancers provided by the ELB service to evenly distribute incoming traffic across multiple ECSs, allowing a large number of users to concurrently access your business system or application. ELB deeply integrates with the Auto Scaling (AS) service, which enables automatic scaling based on service traffic and ensures service stability and reliability.
Figure 2 ELB
Accessing the Internet
- Single ECS accesses the Internet.
When an ECS needs to access the Internet, you can bind an EIP to the ECS so that the ECS can access the Internet. HUAWEI CLOUD allows your EIP to be billed based on bandwidth usage or amount of traffic. If you do not need to use the EIP, you can flexibly unbind it.
Figure 3 EIP
- Multiple ECSs access the Internet.
If multiple ECSs in your VPC need to access the Internet, you can use a NAT gateway and configure SNAT rules by subnet to allow ECSs in the VPC to access the Internet. If you access to the Internet using an EIP but with no DNAT rules configured, external users cannot directly access the public network address of the NAT gateway through the Internet, ensuring ECS security.
Figure 4 NAT gateway
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